Typo: remove duplicated 'can' word (#3343)

Author: AlexanderLukin

public/docs/ts/latest/cookbook/dynamic-form.jade

@@ -120,7 +120,7 @@ include ../_util-fns
   In both components  we're relying on Angular's **formGroup** to connect the template HTML to the
   underlying control objects, populated from the question model with display and validation rules.
 
-  `formControlName` and `formGroup` are directives defined in `ReactiveFormsModule`. Our templates can can access these directives directly since we imported `ReactiveFormsModule` from `AppModule`.  
+  `formControlName` and `formGroup` are directives defined in `ReactiveFormsModule`. Our templates can access these directives directly since we imported `ReactiveFormsModule` from `AppModule`.  
 
 <a id="questionnaire-metadata"></a>
 :marked